C++ error: expected initializer before ‘&’ token
- by Werner
Hi,
the following piece of C++ code compiled two years ago in a suse 10.1 Linux machine.
#ifndef DATA_H
#define DATA_H
#include <iostream>
#include <iomanip>
inline double sqr(double x) { return x*x; }
enum Direction { X,Y,Z };
inline Direction next(const Direction d)
{
switch(d)
{
case X: return Y;
case Y: return Z;
case Z: return X;
}
}
inline ostream& operator<<(ostream& os,const Direction d)
{
switch(d)
{
case X: return os << "X";
case Y: return os << "Y";
case Z: return os << "Z";
}
}
...
...
Now, I am trying to compile it on Ubuntu 9.10 and I get the error:
data.h:20: error: expected initializer before ‘&’ token
which is referred to the line of:
inline ostream& operator<<(ostream& os,const Direction d)
the g++ used on this machine is:
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.4.1-4ubuntu9' --with-bugurl=file:///usr/share/doc/gcc-4.4/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared --enable-multiarch --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.4 --program-suffix=-4.4 --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --disable-werror --with-arch-32=i486 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.4.1 (Ubuntu 4.4.1-4ubuntu9)
Could you give me some hint about this error?
Thanks
